Side frame.



G. G. FLOYD.

SIDE FRAME.

APPLICATION FILED 001.2, 1913.

Patented June 16, 1914.

2 SHEETSSHBET1 1.

Patented June 16, 1914. I

2 SHEETS-SHEET 2.

1 nrrnn s'rArriis PATENT OFFICE.

GEORGE G. FLQYD, OI CHICAGO, ILLINOIS, ASSIGNQR TO AMERICAN STEEL FOUNDRIES,

OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

SIDE FRAME.

inea.

Specification of Letters Patent.

Application filed October 2, 1913. Serial No. 792,951.

ties have been encountered in securing castings which shall give the requisite resistance to stresses without excessive weight. In other words, to so dispose the metal that its full value is secured. A side frame is fundamentally a truss having compression and tension members and a pair of Vertical struts whichform the column guides for the bolster. A difliculty has been experienced in that a crack would frequently appear in the web of metal joining the base of the struts or columns to the tension member. This was first attributed to faulty castings and later by a series of tests extending over a period of time, found to be caused by the tendency of the tension member to straighten under excessive load; on the contrary the columns were found to approach each other; that is, extend or lean inward from the bottom to the top. This caused an excessive stress in the' metal joining the columns to the tension member. I have therefore added a web of metal to the point of convergence of the tension member and which the web is thickened over that of the web throughout the remainder of the frame.

It has been understood to be desirable to provide a side frame which shall have an I- beam section tension member and a channel section compression member. This construction has, however, presented such difliculties in the joining of the two members that it has not been employed. 1 have devised a meanswhereby such sections may be joined without excess of metal and in an 'eflicient manner.

The invention will be more readily understood by reference to the accompanying drawings, wherein,

Figure 1 is an elevation of my novel side frame, the right hand half being a front elevation and the left hand half a rear elevation; Fig. 2 is a section on the line 22 of F1g. 1; Fig. 3 is a section on the' line 33 of F g. 1; Fig. 4 is a section on the line 4-4; of F g. 1; Fig. 5 is a section on the line 5-5 of Fig. 1; Fig. 6 is an enlarged fragmentary elevation of the web strengthening means; Fig. 7 1s a developed plan of the construction shown in Fig. 6; Fig. 8 is a section on the 111168 8 of Fig. 1; and Fig. 9 is a section on the line 9-9 of Fig. 1.

Referring more particularly to the drawings it will be seen that I provide a side frame having a channel-shaped compression member 10, and an I-beam or inverted T- beam shaped tension member 11, also struts or column guides 12, likewise of T-beam section, the compression and tension members being joined attheir ends forming extensions 13, which may rest upon the journal boxes of the truck.

The tension member of my invention is, as shown in Fig. 8, of inverted T-section and is joined to the posts or struts 12, by means of a web 14. As a strengthening and reinforcing means for the web 14, I provide a flange 15, which flange merges into the bulb or enlargement on the bottom of the T section and is flared or widened to provide additional metal at the needed point. The web 11, of the'tension member is comparatively thin throughout the major portion of its length but at the point beneath the spring seat 16, the web is thickened as shown at 17, in Fig. 2. This thickened portion continues to a point outside of the spring seat and is gradually flared off to normal size as shown at 18. As stated, the compression member is of channel form, as best shown in Figs. 3 and 9, and a problem presented itself in the joining of the I-beam posts and tension member to the channel shaped compression member. This is accomplished, as best shown in Fig. 5, by

of the channel compression member. A similar construction is followed at the ends, as shown by Fig. 4. In that View the web 11* is split and flared upwardly and out wardly to provide the webs 21, capped by a plate 22. A very rigid and simple construction is thus provided.

The invention is capable of certain modifications and such modifications as are within the scope of my claims I consider within the spirit of my invention.

I claim:

1. In a side frame, the combination of a channel-shaped compression member and T- shaped tension member and column guides, said compression, tension member and struts being cast in an integral structure, substantially as described.

2. In a side frame, the combination of a channel-shaped compression member and T- and tension member, substantially as doscribed.

GEORGE G. FLOYD. Witnesses:

CHAs. F. MURRAY, T. D. BUTLER. 

